ML Engineer Specialist - Freelance AI Trainer Project

Meridial Marketplace, by Invisible, is seeking a Machine Learning Specialist to tackle hands-on ML challenges that have a direct impact on next-generation AI systems. The role involves solving applied ML tasks, evaluating scientific writing, debugging model behavior, and improving training datasets to enhance AI outputs.

Responsibilities:

• Solve applied ML tasks: iterating on problems that test and improve model reasoning, from baseline solutions to optimized workflows
• Evaluate scientific writing: compare research abstracts and introductions using review rubrics (e.g., NeurIPS guidelines) for clarity, correctness, and impact
• Debug advanced model behavior: probe LLMs on optimization, fairness, regularization, transformers, and applied NLP, documenting failure modes
• Design new benchmark tasks: identify datasets, analyze state-of-the-art papers, build evaluation scripts, and provide reference implementations
• Improve training datasets: deliver structured feedback that makes AI outputs more accurate, reliable, and useful

Requirements:

• Strong background in machine learning, NLP, or data science
• Experience with supervised/unsupervised learning, deep learning, reinforcement learning, probabilistic modeling, and applied NLP
• Proficiency in Python, ML frameworks, and cloud-based workflows
• Clear communication skills, able to explain reasoning and 'show your work.'
• Master's or PhD in CS/ML/data science preferred
• peer-reviewed research or production ML systems a strong plus